A Walking Bar Graph

An art project from 1997 used shoes of various heights to make everyone the same height:

Berlin-based artist Hans Hemmert (famous for his work with balloons) threw a party where guests wore shoe-extenders to make them all the same height of 2 meters. Aside from bringing the partygoers all to a common eye level (and eliminating the awkward postures of party talk between the tall and the short), the gathering is lent an infographic nature by the shoes: all made from blue foam, the person's real height is read in the visual uniformity of the sole instead of at the headlike a walking bar graph.

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